Pomegranate and berry fizz

Method1. Heat the berries and sugar together on a low heat for five minutes, then set aside to cool.2. Bash roughly half of the pomegranate rubies and all the ginger in a mortar and pestle, then drain the juice into a jug. Now add the Cointreau.3. Add a tablespoon of the berry compote to the bottom of each glass, then the pomegranate and Cointreau mixture.4. Top up with brut, and garnish with blueberries, remaining pomegranate rubies and a sprig of rosemary or lavender.